Patents by Inventor S. K. Singhal

S. K. Singhal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • EXTRACTION OF AROMATICS FROM HYDROCARBON OIL USING N-METHYL 2-PYRROLIDONE AND CO-SOLVENT
    Publication number: 20100243533
    Abstract: The present invention provides a process for extraction of aromatic material from hydrocarbon oil by using a solvent mixture comprising N-Methyl-2-Pyrrolidone (NMP), at least one co-solvent and optionally water, to obtain a raffinate. The process of the present invention lowers operating cost as the cost of the co-solvent employed is lower than that of neat NMP. Another feature of the present invention is that it produces the same quality raffinate as those of neat NMP-water measured by the refractive index but produces higher yield of raffinate at same feed to solvent mixture ratio.
    Type: Application
    Filed: March 22, 2010
    Publication date: September 30, 2010
    Applicant: Indian Oil Corporation Limited
    Inventors: N. S. Raman, P. Mohanasundaram, I. Devotta, S. K. Singhal, B. Basu